Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Curb Idle

Idle Speed Adjustment Location:





1. Set the parking brake and block the drive wheels
2. Engine must be at normal operating temperature with the air cleaner on and all accessories turned off
3. Install J 26925 Tachometer or equivalent
4. Adjust the low idle speed screw on the fuel injection pump to obtain the curb idle speed shown on the Emission Control Information label